<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>jQuery demo</title>
</head>
<body>
    <ul>
        <li class="li1">1.1</li>
        <li class="li2" name="li2" istrue="istrue">1.2</li>
        <li class="li3">1.3</li>
    </ul>
    <script type="text/javascript" src="jquery-2.2.3.js"></script>
</body>
</html>